This is the Greenberg's Guides Lionel Trains 1901 - 2017 Pocket Price Guide from Kalmbach.
The Lionel Trains Pocket Price Guide 1901-2017 is a reliable source of market value information for prewar, postwar, and modern trains, as well as postwar boxes and sets. Now in its 37th edition, this valuable resource for operators and collectors offers: Current pricing information. A functional and easy-to-read format that allows collectors to record prices and information directly into the book. A convenient pocket-sized format that s easy to carry.